app.h

#pragma once

#include "pinshape.h"
#include "trayicon.h"
#include "help.h"


class Options;


// Desktop Window Manager management.
// Dynamically loads dwmapi.dll and provides access to cached API state.
// The main window needs to call this to handle broadcast messages.
//
class Dwm : boost::noncopyable
{
    typedef HRESULT (WINAPI* DwmIsCompositionEnabled_Ptr)(BOOL*);
public: 
    Dwm() {
        dll = ef::Win::ModuleH::load(L"dwmapi");
        if (dll) {
            DwmIsCompositionEnabled_ = (DwmIsCompositionEnabled_Ptr)dll.getProcAddress("DwmIsCompositionEnabled");
        }
        wmDwmCompositionChanged();
    }
    bool isCompositionEnabled() const {
        return cachedIsCompositionEnabled;
    }
    // WM_DWMCOMPOSITIONCHANGED handler
    // TODO: use a msg filter instead of specific handler
    void wmDwmCompositionChanged() {
        BOOL b;
        cachedIsCompositionEnabled = dll && SUCCEEDED(DwmIsCompositionEnabled_(&b)) && b;
    }
private:
    ef::Win::AutoModuleH dll;
    DwmIsCompositionEnabled_Ptr DwmIsCompositionEnabled_;
    bool cachedIsCompositionEnabled;
};


// Main application state.
// A single global instance is available to all translation units.
//
struct App : boost::noncopyable {
    ef::Win::PrevInstance prevInst;
    HWND      mainWnd, aboutDlg, optionsDlg, layerWnd; //, activeModelessDlg;
    HINSTANCE inst;
    HMODULE   resMod;
    PinShape  pinShape;
    HICON     smIcon, smClrIcon;
    Help      help;
    int       pinsUsed;
    int       optionPage;
    TrayIcon  trayIcon;
    Dwm       dwm;

    static LPCWSTR APPNAME;

    enum {
        // app messages
        WM_TRAYICON = WM_APP,
        WM_PINSTATUS,
        WM_PINREQ,
        WM_QUEUEWINDOW,
        WM_CMDLINE_OPTION,  // for posting CMDLINE_* options in wparam

        // pin wnd messages
        WM_PIN_ASSIGNWND = WM_USER,
        WM_PIN_RESETTIMER,
        WM_PIN_GETPINNEDWND,

        // system hotkey IDs
        HOTID_ENTERPINMODE = 0,
        HOTID_TOGGLEPIN    = 1,

        // app timers
        TIMERID_AUTOPIN = 1,
    };

    App() : prevInst(L"EFDeskPinsRunning"),
        mainWnd(0), aboutDlg(0), optionsDlg(0), layerWnd(0), 
        /*activeModelessDlg(0), */ inst(0), resMod(0), 
        smIcon(0), smClrIcon(0), 
        pinsUsed(0), optionPage(0), trayIcon(WM_TRAYICON, 0) {}
    ~App() { freeResMod(); DeleteObject(smIcon); DeleteObject(smClrIcon); }


    bool loadResMod(const std::wstring& file, HWND msgParent);
    void freeResMod();
    bool initComctl();
    bool chkPrevInst();
    bool regWndCls();
    bool createMainWnd(Options& opt);
    void createSmClrIcon(COLORREF clr);
    std::wstring trayIconTip();
};